package com.heima.wemedia.service.impl;

import com.alibaba.fastjson.JSONArray;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.heima.apis.article.IArticleClient;
import com.heima.common.aliyun.GreenImageScan;
import com.heima.common.aliyun.GreenTextScan;
import com.heima.common.tess4j.Tess4jClient;
import com.heima.file.service.FileStorageService;
import com.heima.model.article.dtos.ArticleDto;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.wemedia.pojos.WmChannel;
import com.heima.model.wemedia.pojos.WmNews;
import com.heima.model.wemedia.pojos.WmSensitive;
import com.heima.model.wemedia.pojos.WmUser;
import com.heima.utils.common.SensitiveWordUtil;
import com.heima.wemedia.mapper.WmChannelMapper;
import com.heima.wemedia.mapper.WmNewsMapper;
import com.heima.wemedia.mapper.WmSensitiveMapper;
import com.heima.wemedia.mapper.WmUserMapper;
import com.heima.wemedia.service.WmNewsAutoScanService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.util.*;
import java.util.stream.Collectors;

@Service
@Slf4j
@Transactional
public class WmNewsAutoScanServiceImpl implements WmNewsAutoScanService {

    @Autowired
    private WmNewsMapper wmNewsMapper;

    @Autowired
    private GreenTextScan greenTextScan;   //审核文本

    @Autowired
    private FileStorageService fileStorageService;  //下载图片

    @Autowired
    private GreenImageScan greenImageScan;  //审核图片

    @Autowired
    private IArticleClient articleClient;

    @Autowired
    private WmChannelMapper wmChannelMapper;

    @Autowired
    private WmUserMapper wmUserMapper;

    @Autowired
    private WmSensitiveMapper wmSensitiveMapper;

    @Autowired
    private Tess4jClient tess4jClient;

    /**
     * 自媒体文章审核
     *
     * @param id 自媒体文章id
     */
    @Override
    @Async  //异步调用方法
    public void autoScanWmNews(Integer id) {
        //查询自媒体文章
        WmNews wmNews = wmNewsMapper.selectById(id);
        if (wmNews == null) {
            throw new RuntimeException("WmNewsAutoScanServiceImpl文章不存在");
        }
        if (wmNews.getStatus().equals(WmNews.Status.SUBMIT.getCode())) {
            //从内容中提取纯文本内容和图片
            Map<String, Object> testAndImages = handleTextAndImages(wmNews);

            //自管理过滤词审核
            boolean isSensitiveScan = handleSensitiveScan((String) testAndImages.get("content"), wmNews);
            if (!isSensitiveScan) return;

            //审核文本内容 阿里云接口
            boolean isTextScan = handleTextScan((String) testAndImages.get("content"), wmNews);
            if (!isTextScan) return;

            //审核图片  阿里云接口
            boolean isImageScan = handleImageScan((List<String>) testAndImages.get("images"), wmNews);
            if (!isImageScan) return;

            //审核成功 保存app端相关文章数据
            ResponseResult responseResult = saveAppArticle(wmNews);
            if (!responseResult.getCode().equals(200)) {
                throw new RuntimeException("WmNewsAutoScanServiceImpl 文章审核保存app端相关文章数据失败");
            }
            //回填article_id
            wmNews.setArticleId((Long) responseResult.getData());
            updateWmNews(wmNews, (short) 9, "审核成功");
        }
    }

    //自管理敏感词审核
    private boolean handleSensitiveScan(String content, WmNews wmNews) {
        boolean flag = true;
        //获取所有敏感词
        List<WmSensitive> wmSensitives = wmSensitiveMapper.selectList(Wrappers.<WmSensitive>lambdaQuery().select(WmSensitive::getSensitives));
        List<String> sensitiveList = wmSensitives.stream().map(WmSensitive::getSensitives).collect(Collectors.toList());
        //初始化敏感词库
        SensitiveWordUtil.initMap(sensitiveList);
        //查看文章中是否包含敏感词
        Map<String, Integer> map = SensitiveWordUtil.matchWords(content);
        if (map.size() > 0) {
            updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容" + map);
            flag = false;
        }
        return flag;
    }

    //保存app端相关文章数据
    public ResponseResult saveAppArticle(WmNews wmNews) {

        ArticleDto dto = new ArticleDto();
        //属性拷贝
        BeanUtils.copyProperties(wmNews, dto);
        //文章布局
        dto.setLayout(wmNews.getType());
        //文章频道
        WmChannel wmChannel = wmChannelMapper.selectById(wmNews.getChannelId());
        if (wmChannel != null) {
            dto.setChannelId(wmChannel.getId());
            dto.setChannelName(wmChannel.getName());
        }
        //作者
        dto.setAuthorId(wmNews.getUserId().longValue());
        WmUser wmUser = wmUserMapper.selectById(wmNews.getUserId());
        if (wmUser != null) {
            dto.setAuthorName(wmUser.getName());
        }
        if (wmNews.getArticleId() != null) {
            dto.setId(wmNews.getArticleId());
        }
        dto.setCreatedTime(new Date());

        ResponseResult responseResult = articleClient.saveArticle(dto);
        return responseResult;
    }

    //审核图片
    private boolean handleImageScan(List<String> images, WmNews wmNews) {
        boolean flag = true;
        //如果图片为空 直接返回
        if (images == null || images.size() == 0) {
            return flag;
        }

        //图片去重
        images = images.stream().distinct().collect(Collectors.toList());

        List<byte[]> imagesList = new ArrayList<>();

        try {
            //下载图片 minio
            for (String image : images) {
                byte[] bytes = fileStorageService.downLoadFile(image);

                //byte[]转换为bufferedImage
                ByteArrayInputStream in = new ByteArrayInputStream(bytes);
                BufferedImage bufferedImage = ImageIO.read(in);
                //图片识别
                String result = tess4jClient.doOCR(bufferedImage);
                //过滤文字
                boolean isSensitive = handleSensitiveScan(result, wmNews);
                if (!isSensitive) {
                    return isSensitive;
                }
                imagesList.add(bytes);
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        //审核图片
        try {
            Map map = greenImageScan.imageScan(imagesList);
            if (map != null) {
                if (map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规图片");
                }
                if (map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章中存在不确定图片");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return true;
    }


    //审核文本内容
    private boolean handleTextScan(String content, WmNews wmNews) {

        boolean flag = true;

        //如果content为空 则直接返回
        if ((wmNews.getTitle() + "-" + content).length() == 0) {
            return flag;
        }
        try {
            Map map = greenTextScan.greeTextScan(wmNews.getTitle() + "-" + content);
            if (map != null) {
                //审核失败
                if (map.get("suggestion").equals("block")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 2, "当前文章中存在违规内容");
                }

                //不确定信息 需要人工审核
                if (map.get("suggestion").equals("review")) {
                    flag = false;
                    updateWmNews(wmNews, (short) 3, "当前文章内容中存在不确定内容");
                }
            }
        } catch (Exception e) {
            flag = false;
            e.printStackTrace();
        }
        return flag;
    }

    //修改文章内容
    private void updateWmNews(WmNews wmNews, short status, String reason) {
        wmNews.setStatus(status);
        wmNews.setReason(reason);
        wmNewsMapper.updateById(wmNews);
    }

    //1.从自媒体文章内容中提取文本内容和图片
    //2.提取文章的封面图片
    private Map<String, Object> handleTextAndImages(WmNews wmNews) {
        //存储纯文本内容
        StringBuilder stringBuilder = new StringBuilder();

        //存储图片
        List<String> images = new ArrayList<>();

        //从文章内容中提取文本和图片
        if (StringUtils.isNotBlank(wmNews.getContent())) {
            List<Map> maps = JSONArray.parseArray(wmNews.getContent(), Map.class);
            for (Map map : maps) {
                if (map.get("type").equals("text")) {
                    stringBuilder.append(map.get("value"));
                }

                if (map.get("type").equals("image")) {
                    images.add((String) map.get("value"));
                }
            }
        }
        //提取文章封面图片
        if (StringUtils.isNotBlank(wmNews.getImages())) {
            String[] split = wmNews.getImages().split(",");
            images.addAll(Arrays.asList(split));
        }
        Map<String, Object> map = new HashMap<>();
        map.put("content", stringBuilder.toString());
        map.put("images", images);
        return map;
    }
}
